The IBM system x server line covers everything classed within the x86 banner that Big Blue produces. This more than a dozen racks, towers and server blades.
On the rack side, the System x3650 M4, for example, delivers a blend of uptime, performance and I/O flexibility. Utilizing up to two of the latest Intel multicore processors, this 2U rack includes up to 16 2.5" or six 3.5" HDDs or 32 1.8" SSDs.
A more entry-level rack is the System x3550 M4. IBM has priced it attractively and included ease of use features in a 1U box that comes with up to two Xeon multi-core processors. It also packs in up to eight 2.5" or three 3.5" HDDs.
As an alternative to Intel, IBM sells AMD-based machines. The System x3755 M3, for example, harnesses up to four 3.0 GHz 8-core or 2.6 GHz 16-core AMD Opteron 6200 Series processors. This 2U server also has up to 8 hot-swap SAS/SATA. Suggested uses are for Java workloads, high-performance computing (HPC), midtier databases, virtualization and midsize business applications.
Moving onto towers, the System x3500 M4, is a dual-socket tower that delivers scalability, reliable performance and optimized efficiency for business-critical applications. It comes with up to two Intel Xeon processors, up to 768 GB of RAM, and up to 32 2.5" hot-swap or eight 3.5" hot-swap or simple-swap drives.
The x3100 M4, on the other hand, is a value-priced tower with a compact design that can help reduce heat and noise. It contains one Xeon dual- or quad-core processor, up to 32 GB memory and up to four hard drives.
Finally, the IBM System x line also includes several blade servers.